Figure 2.

Absorption coefficient α determination. Optical absorbance (660 nm) as a function of graphene concentration in PhTES and GPTMS. A Lambert-Beer behavior is shown, with an absorption coefficient α of 4,710 and 2,415 ml·mg−1·m−1, respectively.

Nuvoli et al. Nanoscale Research Letters 2012 7:674   doi:10.1186/1556-276X-7-674
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